20400386760 has 128 divisors (see below), whose sum is σ = 73232208000. Its totient is φ = 5021630208.

The previous prime is 20400386759. The next prime is 20400386771. The reversal of 20400386760 is 6768300402.

20400386760 is a `hidden beast` number, since 204 + 0 + 0 + 386 + 76 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 712470 + ... + 740549.

It is an arithmetic number, because the mean of its divisors is an integer number (572126625).

Almost surely, 2^20400386760 is an apocalyptic number.

20400386760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20400386760 is an abundant number, since it is smaller than the sum of its proper divisors (52831821240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20400386760 is a wasteful number, since it uses less digits than its factorization.

20400386760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453052 (or 1453042 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 20400386760 in words is "twenty billion, four hundred million, three hundred eighty-six thousand, seven hundred sixty".